Last year at my former high school a VL3000 was aimed at the cyc. Normally not a problem, except the nose of the 3k was only 6 inches from it. Now there is a nice yellow spot where the heat damaged the fabric. Does anyone have any idea of a way to even slightly disguise the discoloration? We've though of chalk and Rit Dye, but we're worried about what affect it will have on light transmission.